completed part 1 of day 22 of year 2022

Author: fschatbot

2022/22.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import re
+
+def parse(data):
+	grid = {}
+	board, instructions = data.split('\n\n')
+
+	for y, line in enumerate(board.split('\n')):
+		for x, char in enumerate(line):
+			if char == ' ': continue
+			grid[(x, y)] = char	
+	
+	return grid, re.findall(r'\d+|L|R', instructions)
+
+split_data = parse
+completed = 1
+raw_data = None # Not To be touched
+
+def part1(data):
+	grid, instructions = data
+	# Super weird puzzle
+	movements = [(1, 0), (0, 1), (-1, 0), (0, -1)] # Go right, down, left, up
+	rotation = 0 # Starting out facing right
+
+	# Find the start
+	x, y = min(x for x, y in grid.keys() if y == 0), 0
+
+	# print('We start at:', x, y, rotation)
+	
+	for op in instructions:
+		if op == 'R':
+			rotation = (rotation + 1) % 4
+			continue
+		elif op == 'L':
+			rotation = (rotation - 1) % 4
+			continue
+
+		dx, dy = movements[rotation]
+		# print("rot:", dx, dy, op)
+		for _ in range(int(op)):
+			nx, ny = x + dx, y + dy
+			future = grid.get((nx, ny))
+			if not future:
+				# We can do this because of how the map looks. Special to only these kinds of map
+				if rotation == 0:
+					nx = min(gx for gx, gy in grid.keys() if gy == ny)
+				elif rotation == 1:
+					ny = min(gy for gx, gy in grid.keys() if gx == nx)
+				elif rotation == 2:
+					nx = max(gx for gx, gy in grid.keys() if gy == ny)
+				elif rotation == 3:
+					ny = max(gy for gx, gy in grid.keys() if gx == nx)
+			future = grid.get((nx, ny))
+
+			if future == '.':
+				x, y = nx, ny # We move
+			elif future == '#':
+				break
+	
+	# print("We end at", x, y, rotation)
+
+	return 1000 * (y+1) + 4 * (x+1) + (rotation % 4)
+
+def part2(data):
+	# HELL NO
+	...